Carbureter.



H.' AF MLLER.

ARBURETBB.

` APPLIGAT'ION FILED IAN. 11, 1909. l 943,197 i afented Dec. M, 1999.

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HARRY A. MILLER, 0E Los ANGELES, CALIFORNIA, AssIGNoE 'ro MILLER. CABBUEETEB & MANUFACTURING COMPANY, or Los ANGELES, CALIFORNIA, A conIoRATIoN or CALIFORNIA.

CARBURETER.

Patented Dee. 14, 1909'.

Application filed January 11, 15509. Serial No. 471,804.

[o all whom it may concern.: Be it known that I, HARRY'A. MILLER, a citizen of the United States, residing at Los Angeles, in thecounty of Los Angeles and State of California, have vented .a new and useful Carbureter; of lwhich the following is a specification.

This inventionrelates to carbureters prineipally intended for. use in internal combustlon engines, and the main object ofthe invention is to provide a device for this purpose wherein the incoming air will be confined or directed in such manner that a current of air-of maximum velocity will always be presented in proximity to the oil inlet to the carbureter so that maximum entraininfr and atomiziug etect is secured on the oil under all conditions of load and speed.

Another object of the invention is to provide for autolnaticeontrol of the air supply so that the proper mixture will be furnished under all conditions.I

Other objectsl of the invention will ap-V pear hereinafter.

The acompanying drawings illustrate the invention, and referring thereto, Figure l is a vertical section of thtl carburetor. Fig.

Q is an inverted plan view thereof. Fig. 3

is a plan of one of the, controlling valve plates for the air Inlet. Fig. 4 1s a section on line .fri-:r4 in Fig.. l.

. ting 2 which also serres as a throttle cham- .otI the voil inlet valve l5 which controls the of the cap memher T.

her. the throttle .Il being mounted in said fitting. Ihe oll chamber is formed around the. main ehamher member l by a tubular' shell or easing- 5 that screws onto a threaded shoulder t of member l and is screw threaded at itsl upper end to reeeive the cap plate 7 which Vwlien screwed down on said cylinder shell and onto a shoulder S) on the mem-v ber 1 close-s the top ot' the oil chamber l0. ylioat ltmovahle vertically ill the oil chamber is pivotally connected to an arm '12 pivotalliy mounted on a standard Yl' on eap plate T, said arm engaging the stent let oil inlet. duet formed in a` lug 1 7 on top Said oil inlet duct connectsl at o ne end with the oil supply pipe and at`tl1e other end it eonununicates into chamber of the carbureter. tion may consist of a tube 20 communicatin 65 the oil chamber 10. Valve stem 14 slides in desired number, for example, four, o'il connections lead to an oil inletv in the mixing at one end through a hollow stud 21 Wit the bottom of the oil chamber, theother end of said tube leading into a central tube 23 Each connecextending axially and vertically in the mixl ing chamber 24 which is formed within the body 1 of the carbureter. A valve stem 27vex.- tends axially and vertically within this central tube, said valvestem ha'vingan operating handle 28 u on its lower end and passin through a stu ng box 29 at the lower en of the said tubular member. A portion of said valvel stem is recessedA or cut away, as shown at 30, in Figs.` l and 4, to form passages to Vconduct the oil from the outlets 32' iis ofthe oil tubes 2O to the top of the tube 23,

and the upper end yof the valve stem is` adapted to t andclose the upper end of the cylindrical bore of tube 23, the said recesses or chaunels-30 in the valve stem being gradually tapered at their upper ends`- so that vertical adjustment of the valve stem varies the amount of opening of each-passage into the mixing chamber. c'al adjustment of the valve stem is provided for by a'serew thread 35 formed in the tube 23 and on the ribs or portions of the valve stem between the vertical channels 3 0 aforesaid. A removable upwardly Haring sleeve 36 is slipped on the upper end oftube v'23, and held by internal lugsA 36- on said sleeve enea '11G 1n a Groove 23 in said tube.

lf D b The bottom of the Amixing chamber -1 is closed or partly closed by a` plurality of wings 37, 3 8, 39 arranged in circular order on a horlzonta around the bottom of the mixing ehamber'v4 ,-1

each wine beinfrI mounted hinge or Journalht() and extending obliquely upward and inward toward the 'centerof the Such vertimixing chamber, the inner ends of said wings being adapted to extend,` when said wings are in most depressed conditionyclos to the central tube 9.3 so that the complete set of wings substantially closes the mixing chamber at the bottom. To provide "for` more effectual closure said V Wings are adapted to overlap, oiof the wings, as 37, being 2OT are concavely curve 'sent'an.approximatelycircular opening.v

adapted to overliethe -two wings V38 at the v're'.spective sides thereof and said two wings beingbadapted=tooverlie the next wing or Wings. In the form shown, where there are 5 four wings, there will be one vtop wing, one

bottomwing and two intermediate wings yextending beyond the top and bottom wings.

Said wings extend in different radial -positions with -respect to the air inlet, so as to lOvoccupy different. portions of.A the air inlet and so tha-ttaken together they shut 'off the air inlet when they are in closed position, and the wings are hinged or pivoted at their outer endson the walls vof the air inlet 'by l yhinges 40. Inv order!" that thefwings shall The position o f the aforesaid air ontrollingimeans or valv members is controlled l automatically by the'y suction through the mixing liamber, said suction acting in opposition to suitable `means tendingto hold the wings to closed position. Said means may consist,` for example, of spring means ,acting on an arin 42 extending outwardly Q'froinwthe hub 43 ot' tlietop wing 374 and' tendingto press said top-wing dfiwnwardly` to closed iosition. rll'iiscauses the t0 win'o i "3 to press .downward-ly on the. intermediate .Wings which in turn are lpressed 'down onto the bottoni Wing 35). The vdownward move-l "mentis' limitedby suitable means, for example', a' stop screw 44' engagnigwith an ai'iii 45 :extending fo'utwardly fronrthe hub- 46 of'saidbottoin wing.` The arm-"42 aforesaid is pivotally vconnected to ascrew rod 48 'on'the upper'end ot' which screws a nut 49,'

.said nut having an outside threadv 50 on which screws a screw collar 51,- a helical spring-52 being provided between a Hang'e "i 15 53 on .thebody l and the outer screw collar 51, and another helical spring 54 resting on saidflange and extending upwardly within tliespring 52 and into a cylindrical cavity v55 in the aforesaid nut 49. Vhen the air. 50 valveis fully closed, in the position' shown in Fig. l'the spring 52 alone 1s in operation,

tending `to -hold saidl valve in closed position,'but whensaid valves open to a certain extent vthe nut 49 vis pulled down by the rod .55 48 asuflicient ldistance to bring the top of xthe cavity 55 tobear on the supplementary spring 54 bringing the supplementary or accuinulative spring into action to offer increased resistance to further lopening of the 0 air valve. A tube 57 extends over spring 52. l Stop screws 44 may have a plunger 58 oper-l ated by, a spring 59 to ease 0E the 'drop of the wings. l

, The operation is as follows: The outlet '6.5 or throttle chamber 2 is attached to animi, 7, V943,197l

passage 1Q to the oil chamber l0 and when the oil`in said chamber reaches` a definite level the float l1 will operatevto close the oil valve 15 shutting off further supply of oil,-

a definite level of oil being thereby secured vin the oil chamber, this level being such lthat the oil will flow nearly to the 'top of the central tube 23. lVhcn the engine is at rest the oil valve member 2T is in its 'lowerniost posi.

tion so that none of the channels 30 therein extend above the tubular member 23 and oil is thus prevented from passing intol t-he mixing chamber. When it is desired ,to operate the engine the handle 28 is turned to screw the valve member 27 upwardly, the tapering shape of the upper end ofthe channels 3 0 enabling any desired size of oil inlet opening to be thereby secured. -At each suction stroke of the engine a condition of suction 1s produced within the mixing chamber l.:

causing the air valve members 3T, 38, 39 to be lifted, and as they rise they Aturn away from the member 23 so as to form between said membery and the lips of said v'valve members an annular passage which serves las an air inlet, expanding or spreading as the valve members 3ft, 38, 33t) rise.

The air is drawn in through this annular airv f inlet closeitb themeinber and to the oil inlet at the top thereof and the conical shape of the structure presented by the several bvalve members 37, 38,39- causes the incoming airto tend to hug the central member 2? and to'present a condition o't'imaximum vcvlocity-diiectly adjacent to the oil inlet at the top-of said member. At the sainetinic the upwardlytaperiiig-shape of thc oil inlet lchannels 3() in the oil` valve member 2i' serves to eject the oil in separate jets upwardly and outwardly into this coiiceii-` ti'ated current of air. 87, 3S, 39' open farther, under the condition ot' greater suction in the mixing chamber, more air will be admitted. ln every case it will be confined as much as possible to the central part of the mixing chamberand in proximity to the oil inlet. Under co dition of abnormal suction when the air rolling valve .members 37, k38,39 arek wide open it is desirable that their freedom of further opening should be restricted so as to provide for properA enrichment of the mixture, and for this purpose the sup leiiientary spring 54 aforesaid is provi ed, said 'spring coming into operation under such conditions to. produce cumulative resistance to the opening `of the valve and therebyreduce the increase .of opening of the valve members for a given increase of suction.

lill) liti-'i As the valve members n ,arly i 'W hat I claim isf-Q l. A. carbnreter comprising a mixing chamber, 'oil supply means provided with an inlet into said mixing chamber, said mixing chamber having an air inlet `provided with a plurality of valve members movable simultaneously in the direction or' the motion of the fluid through the carluireler, and oening in such direction by the suctional eit'eet of said fluid, to torni a variable air passage around and adjacent to the oil inlet, said valve members overlapping to maintain the condition ot' closure except at said passage. l

2. A carburetor comprising a mixing chamber, oil supply means, a tubular member communicating with said oil supply means and extending into the mixing chamber to form an oilinlet, a valve member movable in'said tubular member to control the l'oil inlet, said mixing chamber having an air inlet surrounding said tubular member, and Valve Wings controlling said air inlet and mounted on horizontal hinges and extending upward .and innjard from said hinges to Jform a eonoidal' structure, said wings being movable on said hinges toward and Jfrom said tubular member to spread or contract the air inlet l,opening directly around the tubular memb r and the oil inlet, said valve members overlapping 'to maintain the condition of closure except at said passage.

3. A' earbur'eter comprising a mixing chamber, oil supply means having an'oil inletinto said mixing chamber, said mixing chamber provided with an air inlet, and a plu ality of movable valve Wings at said air inlet, said valve Wings extending in difterent radial positions relatively to `the air inlet and heilig hinged to the Walls of the air inlet at their outer ends and extending inward and upward from their hint/es `and adapted to move toward or from the oil inlet to spread or contiiact the size of the air inlet around the oil` inlet, and said Valve members overlappino to maintain the condition of closure except at said passage.

4. A carburetor lsomprising a mixing chamber,- oil supply 1 leans provided with an inlet into said mixing chamber, said mixing chamber having an air inlet provided with a plurality ot valve members movable simultaneously in the direction ot' the-motion of the tluid through the carburetor, and opening in such direction by the suctional effect ot'said fluid, to form a variable air passage around and adjacent` t0 the oil inlet, said valve members being movable automatically under control of the suction in the mixing' chamber to expand the air inlet,.and spring meanstemiling to close said valve members,

the spring means :tor each valvemember. comprising a plurality of spring devices brought successively' into operation in the opening of the valve to produce cumulative resistance to such opening.

'carburetor comprising a mixing chamber, oilsupply means, a tubular member eomnmnicating with said oil supply means 'and extending into the mixing chamber to-form an oil inlet or valve member movable in said tubular member to control the oil inlet, said mixing chamber having an air inlet surrounding said tubular member, and movable valve means controliing said air inlet and movable toivard and from said tubular member to spread or contract the air inlet opening directly around the tubular memberand the oil inlet, said falve means t'ormed as hinged wings overlapl'iing one another and movable under the suction ot' the imixing chamber to expand the air inlet, and

spring means operating on said valve means io close the same.

A carburetor comprising a mixing chamber, oil suppliY means, a tubular member communicating with said o il supply means and extending into the mixing cham' ber to form an oil inlet or valve member mo 'able in said tubular member to control the oil inlet, said mixing chamber having an air inlet .surrounding said tubular member, andino vable valve means controlling said air inlet and movable toward and from said tubular member to spread or contract the air inlet opening directly around the tubular memberand the oil inlet, said valve means termed as hinged wings overlapping one another and movable under the suction of the mixing chamber to expand the air inlet, spring means operating on one of the lWings, and `tending to close all. the Wings, and stop means engaging with another ot' thewings lo limit the closing movement.

In testimony whereof, I have hereunto set my hand at Los Angeles, California, this 31st day oit' December 1908. f

HARRY A. IvUJLER In presence ot'-a ARTHUR P. KNIGHT, FRANK L. A. GRAHAM.

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